Which preposition to use with sinuosities

of Occurrences 26%

The wood, which was all cut to the same length, and channelled out to admit the free passage of the air, was then duly placed in the stove, and set on fire; but the heat not passing very readily through all the sinuosities of the pipe, he ordered his head cook to screw on his exhauster.

in Occurrences 2%

A little before three o'clock it was seen from the deck and as we stood towards it we narrowly escaped striking on a part of the shoal that extends off Cape Londonderry: our course was then directed towards some broken land in the South-West which proved to be a group of islands with a considerable sinuosity in the coast behind them; the eastern head of the bay was called Cape Talbot after the then Lord Lieutenant of Ireland.

Which preposition to use with  sinuosities